Im trying to change the gear ratio in hptuners for 98 tahoe.
Put in 4.56 as new gear ratio and type in the new tire size but it wont let me commit only undo. What am I missing?
Im trying to change the gear ratio in hptuners for 98 tahoe.
Put in 4.56 as new gear ratio and type in the new tire size but it wont let me commit only undo. What am I missing?
Might need to be manually scaled, GM has several different ways to calculate gear/tire size in trucks(I think four off the top of my head) and our software can only do one so some os's must be manually scaled.
It doesn't have to be perfect, it just needs to be done in two weeks...
A wise man once said "google it"
So I just change the final drive section to 4.56.
Then go into manual scale 4.56/3.42= 1.333 scale it to this?
Then how do I manually scale the tire size.
You would generally need to scale PPM & the shift point/TCC lockup tables, in many calibrations tire size is actually not stored in the pcm.
It doesn't have to be perfect, it just needs to be done in two weeks...
A wise man once said "google it"
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